The present invention provides authentication method and authentication device for communication apparatus and a communication apparatus. The communication apparatus comprises at least one of a communication terminal and a communication card, and the authentication method comprises: S10: binding identity information of owner of the communication apparatus to the communication apparatus; S20: requesting to obtain identity information of a user when the communication apparatus is restarted; S30: comparing the identity information of the user obtained through requesting with the identity information of the owner of the communication apparatus bound to the communication apparatus; S40: determining whether the obtained identity information of the user is the same as the identity information of the owner of the communication apparatus bound to the communication apparatus, if yes, proceeding to step S50, otherwise, proceeding to step S60; S50: starting the communication apparatus normally, and S60: locking the communication apparatus.